and if there is a top secret sub launched intercontinental surface to air anti-aircraft missile that nobody has ever seen :^)
there are sub launched anti aircraft missiles but they are in their infancy they don’t have the range and would require complex guidance systems one to fly the missile half way around the world and another to acquire the moving target of the other aircraft
I can tell you one thing with certainty. People do NOT know what advanced weapons systems the US military has or how far along they are in development.
But there are plenty of publications out and about that write like they know what’s what.
When reading military matters, I always have in the back of my mind a guide that I will not know what is what unless I have a need-to-know and even then I may have only a limited compartmentalized view.